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Google enters I/O as a vigorously diversifiedcompany. While Apple, which held a similar developer conference earlier this month at the same location, focuses its efforts on a small number of categories -- PCs, mobile devices, and a few media services among them -- Google has a wider palette. Its hand is in everything from search to tablets to smart home devices.

Google's pitch to developers comes as tech giants are watching users switch their attention away from desktop computers to smartphones and tablets, and starting to look at other screens, including smartwatches and car dashboards. Inhabiting those platforms means Google can extend its reach, and collect the valuable user data the company -- and advertisers -- covet.

To see full coverage of Wednesday's Google I/O keynote address, visit CNET's Live Blog.